Improvement in the methods of inserting bolts in boiler-plates



. N. S. BARRITT. Method of Inserting Bolts in Boiler-Plates.

.No. 204,650. Patented June 11, 1878.

UNITED STATES PATENT OFFICE.

NEWBY S. BARRITT, OF SAUGERTIES, NEW YORK.

IMPROVEMENT IN THE METHODS OF INSERTING BOLTS IN BOILER-PLATES.

Specification forming part of Letters Patent NO. 204,650, dated June 11,1878; application filed November 19, 1877.

To all whom it may concern Be it known that I, NEWBY S. BARRITT, ofSaugerties, in the county of Ulster and State of New York, have inventedcertain Improvements in the Method of Inserting Bolts in Boiler-Plates,of which the following is a specification This invention consists in themethod of inserting bolts in boiler-plates, or in other plates difficultof access, by providing the bolts each with a cross-groove in the end,bridged over, fastening a hook or wire therein, passing the said hook orwire through some opening in the boiler and through the bolt-hole andits nut, and holding the bolt in position while screwing the nutthereon, all substantially as hereinafter specified.

In the present state of the art, when it becomes necessary to insert abolt from the inside of a boiler, for instance, and the point ofinsertion cannot be reached from the manhole or hand-hole, it iscustomary to tie a string or cord around the tip of the bolt, so as toform a loop; then a wire is inserted through the bolt-hole from theoutside, the end passed through to the hand-hole, and the bolt hookedon. When the bolt has by this means been drawn to the hole it is tooccupy it is pulled through by means of the string. This is difficult todo if the bolt fits the hole snugly, as the strands of the cords mustoverride the screw-threads and tend to enlarge the bolt.

In addition to this difliculty is the danger arising from the sharpedges of the opening tending to fray and cut the cord and permit thebolt to drop back into the boiler. Furthermore, as the cord must beremoved before the nutcan go on, it is very difficult to hold the boltwhile engaging the nut; and after the nut is engaged the bolt is apttoturn with it and battle all attempts to tighten the nut.

To obviate or avoid all of the above-named difficulties is the object ofmy present invention, which I will now describe.

In the drawing, Figure 1 is a side view of my improved bolt, partiallyin section. Fig. 2 is a plan of the same. Fig. 3 is a side View taken atright angles to Fig. 1.

Let A represent the head of a bolt, and B the shank of the same, whichmay be of any desired length. Through the tip or extremity of the bolt Idrill a hole, a, of small dimensions, the said hole being preferably asclose to the tip of the bolt as it can be bored, and leave a thin bridgeor tie, b. At 0 c a portion of the metal between the hole and the end ofthe bolt is cut away or otherwise removed, as shown. This enables me toattach a wire directly to the bolt by booking it under the tie b, asshown in Fig. 3. The spaces 0 c are sufficiently deep to allow the wireto clear the screw-threads, and the nut may be strung over the wire andscrewed onto the bolt without removing the wire. Moreover, a bolt ofthis kind may be used that will snugly fit the bolt-hole, as the wire isnot in the way; and there can be no possible danger of the wire or cordbeing out by the sharp edge of the hole, as with the ordinary bolt.

In Fig. 1 I have indicated in dotted lines the application of a hook orkey to engage the cavity under the tie b.

By means of this device, which may be a hook of any kind that will enterthe cavity, the bolt can be held steady and prevented from turning whilethe nut is screwed on. If a somewhat stiff wire is used, as in Fig. 3,this may serve the same purpose.

The spaces cut away at c 0 must extend in toward the center far enoughto permit the wire to clear the screw-threads and allow the nut to goon; but the exact depth is immaterial.

I claim--- The improvement herein described in fixing plates to boilers,which consists in providing the bolt with a cross-groove in its end,bridged over, as described, fastening a hook or wire therein, passingsaid hook or wire through some openin gin the boiler and through thebolt-hole and the nut, and holding the bolt in position while the nut isscrewed thereon, as and for the purpose set forth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

- NEWBY S. BARRITT.

Witnesses:

SAM. TRO. SMITH, HENRY CONNETT.

